Video: Puas yog Chav Kawm 2 txuas xov tooj xav tau cov kav dej?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
2 (NEC 2002), tso cai installation ntawm Chav kawm 2 thiab Chav kawm 3 system conductors nyob rau hauv tib yam kav dej nrog lub zog conductors. Cov conductors yuav yuav inherently ua ke, ob qho tib si inductively thiab capacitively; txawm li cas los coupling-yooj yim conductor rwb thaiv tsev theem thiab arbitrary Circuit Court rov cais tawm.
Tsis tas li ntawd nug, kev xaim 2 yog dab tsi?
NEC txhais a Chav Kawm 2 circuit raws li ib feem ntawm lub kab hluav taws xob system nruab nrab ntawm lub load sab ntawm a Chav kawm 2 lub zog qhov chaw thiab cov khoom siv txuas nrog. Vim nws txwv lub zog, a Class 2 circuit yog suav tias muaj kev nyab xeeb los ntawm qhov chaw pib hluav taws kub thiab muab kev tiv thaiv zoo los ntawm hluav taws xob poob siab.
Ib sab saum toj no, Class 2 thiab 3 circuits yog dab tsi? Class 2 thiab 3 circuits txhais tau tias yog ib feem ntawm cov kab hluav taws xob nruab nrab ntawm cov khoom siv hluav taws xob thiab cov khoom siv txuas nrog. Class 3 circuits txwv lub zog tso zis mus rau theem uas feem ntau yuav tsis pib hluav taws. Txawm li cas los xij, lawv tuaj yeem ua tau thiab ua haujlwm ntawm qib siab dua thiab, yog li, tuaj yeem ua rau muaj kev phom sij txaus ntshai.
Tom qab ntawd, lo lus nug yog, qhov txawv ntawm Chav Kawm 1 thiab Chav Kawm 2 yog dab tsi?
Class 1 kab yog qhov yuav tsum tau ua kom dhau cov qauv rau lub zog thiab teeb pom kev zoo kab hluav taws xob . Nws yuav tsum zaum hauv cov hlau los yog cov hlau tsis yog hlau los yog hlau-sheathed kab hluav taws xob piv rau jacketed kab xws li hom NM. Chav kawm 3 kab hluav taws xob yog functionally zoo ib yam li Class 2 kab , tab sis nrog ntau dua voltage thiab hwj chim txwv.
Kuv puas tuaj yeem khiav 2 circuits hauv tib lub kav dej?
Pub cais circuits dhau ntawm tib raj . Koj ua tau qhov no, tsuas yog xyuas kom tseeb tias koj kav dej nws loj txaus los tuav cov xov hlau yooj yim. Qhov loj downside ntawm no yog tias, thaum nws tsuas xav tau lwm yam kav dej khiav , nws kuj xav kom koj mus tsev khiav peb circuits rau koj lub tsev. Khaws lawv ntawm ib qho Circuit Court.
Pom zoo:
Puas yog cov kab hluav taws xob hauv qhov chaw nkag mus xav tau cov kav dej?
Cov hlua hluav taws xob yuav tsum tau txais kev txhawb nqa saum taub hau txhua 4.5 ko taw. " Nov yog NEC qhov yuav tsum tau muaj rau NM cable hauv qhov chaw nkag: Cable yuav tsum raug tiv thaiv los ntawm lub cev puas tsuaj yog qhov tsim nyog los ntawm cov kav hlau tsis zoo, cov kav hlau nruab nrab, hluav taws xob hlau tubing, Teem sijhawm 80 PVC conduit, lossis lwm yam kev pom zoo
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